Evaluation of Dose Equivalent of Exposure Dose in Neighbor Organs X-Ray Photography in Chest / 医疗卫生装备

ABSTRACT

Objective To investigate the magnitude of dose equivalent of exposure dose in different organs of human being using high and low KV X-Ray photography in chest.Methods Dose equivalent of exposure in point of centricity,thyroid,mammary gland and pubic symphysis were detected using thermoluminescence determinator when photographed using different size of exposure field or high and low KV in chest.Results Using center measure point as reference point,dose equivalent in high KV reduced 82% in average to low KV in posterior-anterior position of chest,dose equivalent in high KV reduced 194% in average to low KV in lateral position of chest.All dose equivalent of exposure dose in sensitive organs in non-projection center in high KV photography lower than those in low KV photography.Conclusion When the KV is as high as possible and the exposure field is as small as possible,each dose equivalent of exposure dose of organs out of exposure field is decrease.Dose equivalent of exposure dose in mammary is the highest,those in thyroid is the secondary,and genitical gland area has the lowest dose.